Ventilator



Sept. 11,1923.

w. M. LANGE VENTILATOR Filed March 5, 1923 Patented Sept. 11, 1923.

UNITED STATES WALTER MASON LANGE, OF LONDON, ENGLAND.

VENTILATOR.

Application filed March 5, 1923.

To all whom it may concern Be it known that I, WALTER Mason LANGE, a subject of the King of Great Britain and Ireland, and residing at 16-1 Buckingham Palace Road, London, S. W. 1, England, have invented certain new and useful Im proved Ventilators (for which I have filed application in England, Aug. 17, 1921, Number 21,856), of which the following is a specification.

This invention relates to ventilators and has for its object to provide a device of this character which shall be essentially Simple in construction and whereby the power required to operate the device will be relatively small.

In order that the invention may be more fully understood reference is now had to the accompanying drawing in which:

Figure 1 is a transverse sectional view through a partition or wall having a ventilatin opening therein and showing the invention applied thereto, the drive shaft of the ventilator being broken away.

Fig. 2 is a transverse sectional view through the drive shaft showing the rotary blade members.

Fig. 3 is a sectional view similar to Fig. 1 showing a modification of the invention.

Fig. 4 is a transverse sectional view through the drive shaft of the modified type of ventilator, and

Fig. 5 is a fragmentary top plan view of the drive shaft and blade members.

Referring to the drawings in detail, 24 indicates a fragment of a wall, window or partition having a circular opening 25 therein. A drive shaft 27 is arranged centrally within the opening 25 and is adapted to be driven by a suitable type of motor (not shown). The shaft 27 is preferably polygonal in cross-section and a correspondingly shaped sleeve 26 is slidably mounted thereon and carries rod-like blade members 26. The sleeve 26 is adapted for adjustment longitudinally on the shaft 27 and is held against accidental displacement by friction.

A closure plate 29 is adapted. when the ventilator is not in use, to cover the opening 25 and for this purpose it is supported upon rods :28 slidable through the wall or partition 24.

As shown in full lines in Fig. l. the sleeve 26 carrying the rotary blade members 26 is located at the left hand side of the partition or wall 24, and hence during rotation of the Serial No. 622.986.

shaft 27, the blade members act to draw air, gas or other fluid through the opening 25 from right to left. When it is desired to cause the air or other fluid to be drawn through the opening 25 in the opposite direction, the sleeve 26" is slid along the shaft 27 in the direction of the arrow a (Fig. 1) until the blade members 26 assume the position indicated in dotted lines so that during rotation of the shaft 27 air is drawn through the ventilating opening 25 from left to right.

lie't'errin to the modification of the invention illustrated in Figs. 3 to 5, the rotary blade members 31 are connected by a spherical member 35 which are mounted to turn and slide in grooves 30 in a hollow shaft $30. The grooves 30 are of somewhat smaller width than the diameters of the members 31 and they are provided at spaced points with pairs of notches 31 into which the blade members 31 are adapted to engage whereby the latter are held in the operative full line position disclosed in Figure 3.

The turning movement of the s herical member within the hollow sha t 30 is lin'iitcd by a pin 35 carried by one of the blade members 31 and engageable with the hollow shaft 30", hook members 32 being secured to the extremities of the blade members to facilitate angular adjustment of the blade member with respect to the shaft.

To move the blade members from the position indicated at b in Fig. 5, through the opening 33 in the wall or partition 34. to the position indicated at c in Fig. 5, the blade members 3] are turned to the oblique position indicated by dotted lines at the left of Figure 3 and the blade members and spherical member 35 low shaft 530 to the oblique position indicated at the right of Fig. 3. The blade members are subsequently turned so as to occupy a position at right angles to the shaft 30. the blade members entering the notches 31 in the shaft 90* at the right of the partition or wall vt thus maintaining said blade members in operative position against accidental displacement.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:-

I. In combination, a wall having a ventihiting opening herein. a. drive shaft ex tending through said opening. and blade members mounted for adjustment longitudinally of said shaft whereby said blade memare moved bodily in the holllO hers may be moved from a position on one side of the Wall to a position on the other side thereof to reverse the direction of flow of fluid through the ventilating opening upon rotation otthe shaft and blade members.

2. In combination, a Wall having a ventilating opening therein, a drive shaft extending through said opening, blade members mounted for adjustment longitudinally of said shaft whereby said blade members may be moved from a position on one side of the Wall to a position on the other side thereof to reverse the direction of the lion: oi fluid through the ventilating opening, a closure plate normally occupying a position laterally of the blade members, and means inovably supporting said closure plate on said Wall whereby said plate may be moved to a position to close the ventilating opening.

in combination, a Wall having a vent lating opening therein, a shaft extending through said opening, a non-rotatable sleeve mounted for sliding movement on said shaft, blade members carried by said sleeve and located at one side of the Wall Wherebyto induce a {low or lluid therethrough, said sleeve and blade members being movable to a position on the other side of the wall whereby to reverse the direction of flow of fluid through said ventilating opening, a closure plate normally occupying a position laterally of said blade members, and means mot-ably supporting said closure plate whereby the latter may be moved to a position to close the ventilating opening.

in testimony whereof I have signed my name to this specification.

lVAL'lEI-t MASON LANGE. 

